2. TapouT

One of the UFC's longest-running sponsors, TapouT is the largest MMA-focused clothing brand in the world.

While TapouT shirts have become a widespread mark of an uneducated MMA fan, it is undeniable that the company has helped spread recognition of the sport into the mainstream.

TapouT hit a snag with the UFC in 2010, when they decided to make a deal with Fedor Emelianenko. However, UFC President Dana White strong-armed the company out of that deal with a threat of banning the TapouT logo from the UFC.

With that conflict now in the past, TapouT's relationship with the UFC has remained strong. TapouT figureheads regularly appear at UFC events.

1. Bud Light

Every major sports league needs an exclusive sponsorship with a beer company. For the UFC, that sponsorship is with Bud Light.

The UFC's relationship with Bud Light has grown rapidly over recent years, and the two companies renewed their sponsorship deal with one another earlier this year.

Recently, Bud Light has produced a racy commercial for its Bud Light Lime product, which featured Octagon Girl Arianny Celeste. Also, the beer company has released a nationwide commercial promoting its product along with UFC Fight Night 25.

Sean Smith is a Featured Columnist for Bleacher Report MMA. For the latest insight and updates on everything MMA, you can follow Sean on Twitter here.